You are downloading the Don'tFall XAP file v188.8.131.52 for Windows Phone. Don'tFall is a free and fun Racing & Flying game: Slide the yellow cubes with your finger in order to fill all the holes in the path. The ball must not fall down ... You can now download the offline XAP file to install & try it.
Download Locations for Don'tFall 184.108.40.206 XAP file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline Don'tFall XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.